JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Zhikun Huang,Haojie Yu,Li Wang,Xiaowei Liu,Shuning Ren,Jinyi Liu
Designing graphitic carbon nitride (CN) based heterostructured photocatalysts with high catalytic activity is highly desired for peroxymonosulfate (PMS) activation to degrade organic pollutants from water. Herein, a novel heterostructured composite (U-F@CN) consisting of ferrocene-modified Uio-66-NH 2 (U-F) and CN was synthesized. The U-F@CN exhibited superior photocatalytic performance to degrade bisphenol A (BPA) in the presence of PMS under visible light. The experimental results indicated that BPA could be removed entirely by U-F@CN within 60 min under visible light irradiation. In addition, the outstanding photocatalytic activity could be maintained at high level in a wide pH range, appropriate temperature region and natural water condition. Benefiting from the good chemical stability, outstanding optical property and in-situ generation of interfacial heterojunction of U-F@CN, the interfacial transport of photogenerated charges could follow the Z-scheme mechanism, which can accelerate the charge separation and transport to yield abundant reactive active species (ROS) to efficiently active PMS and under visible light. This work provides a novel approach to design CN-based heterostructured photocatalysts with high stability and superior photocatalytic activity for environmental remediation.
研究领域:
材料科学
·
环境科学
·
化学
·
光催化
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Maxim V. Mikhailenko,Tatiana Yu. Astakhova,Elena N. Timokhina,Maxim A. Faraonov,Alexey V. Kuzmin,Salavat S. Khasanov,Denis V. Korchagin,Gennady V. Shilov,Akihiro Otsuka,Hiroshi Kitagawa,Dmitri V. Konarev
A series of anionic bi- and trinuclear complexes of CoII, FeII and MnII with hexaazatrinaphthylene (HATNA) and hexaazatriphenylenehexacarbonitrile (HAT(CN)6), incorporating paramagnetic Cp*2Fe+ cations (S = 1/2), were obtained. It was demonstrated that even a mild Cp*2Fe reductant can be used to reduce metal complexes of HAT-type ligands. Metal iodides were transferred from the pristine powder to the complexes in a non-coordinating solvent via complex formation with spiropyran or tetrabutylammonium iodide. The isostructural complexes (Cp*2Fe+)[(MIII2)2·HATNA]−·C6H4Cl2·0.5C6H14 (M = Co (1), Fe (2) and Mn (3)) contain monoanionic [(MIII2)2·HATNA]− units, which alternate in π-stacks with Cp*2Fe+ cations and also form π-stacked [(MIII2)2·HATNA−]2 dimers. Metal ion coordination is asymmetric, featuring one short and one long M–N bond. The short M–N bonds are 1.973(6) Å for CoII (1), 2.039(4) Å for FeII (2), and 2.115(4) Å for MnII (3); these are the shortest bonds reported to date among studied HAT-based complexes for CoII and FeII. These complexes exhibit very strong antiferromagnetic metal–radical coupling, which isolates their high-spin ground states at high temperatures. To the best of our knowledge, the exchange coupling value of −300 cm−1 observed for 3 is the highest among MnII-containing complexes based on a radical ligand with delocalized spin. Compound (Cp*2Fe+)[(FeIII2)3·HATNA]−·C6H4Cl2 (4) is unique due to its magnetic behavior, which is severely different from that previously observed for similar trinuclear radical FeII-containing HAT-based complexes. Instead of a smooth increase in the χMT value with a temperature decrease, attributed to the formation of a high-spin system, a rapid increase below 30 K is observed. Trinuclear trianionic species [(FeIII2)3·HAT(CN)6]3− are isolated in (Cp*2Fe+)3[(FeIII2)3·HAT(CN)6]3−·4C6H4Cl2 (5) and do not participate in intermolecular exchange coupling. The unusual magnetic behavior of 5 can only be described by a model implying different signs of D for metal ions in the complex. Such a feature arises from the substantial difference in the coordination geometry of one Fe1 ion compared to the other two Fe2 ions.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yong Yang,Zheng Tang,Baojing Zhou,Jinyou Shen,Huichao He,Amjad Ali,Qin Zhong,Yujie Xiong,Chao Gao,Ahmed Alsaedi,Tasawar Hayat,Xiaoyong Wang,Yong Zhou,Zhigang Zou
An absolute metal-free in-plane heterosystem consisting of g-C 3 N 4 as scaffold and embedded half-metallic C(CN) 3 as cocatalysts was conceptually designed for photoconversion of CO 2 . The no-slot joint between half-metallic C(CN) 3 and g-C 3 N 4 through covalent bonding generates a unique two-dimensional, π-conjugated hybrid structure, allowing obstacle-free transferring of the photogenerated electrons in g-C 3 N 4 into C(CN) 3 via an intrinsic driving force. Our theoretical calculations together with the in-situ Fourier transform infrared spectra indicate that the most negative charge distribution and binding energy with CO 2 for C(CN) 3 allow outstanding capture and chemical activation capacity toward CO 2 , and subsequently enable the optimized heterosystem to exhibit highly efficient and selective photocatalytic reduction of CO 2 into CO, 7.8 and 1.9 times those produced with pristine and Pt-modified g-C 3 N 4 , respectively. The no-slot joint of organic half-metal cocatalysts with g-C 3 N 4 may open up new opportunities for metal-free, polymer-based photocatalytic systems for CO 2 conversion and solar fuel generation.
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 6
·1-10
·
IF 6.232
Yang Limin,Gao Yukun,Fang Kai,Sun Hui,Sun Jingtao,Liu Hanyun,Feng Weihua,Jiang Lei
A peptide (Li5–025)-modified gold nanoparticle (AuNP)/(titania (TiO 2 ) + 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphine (TAPP))/glassy carbon electrode (GCE) was developed for lipopolysaccharide (LPS) determination. This electrode not only performs well in the electrochemical impedance determination of LPS in serum but can also be easily regenerated under light irradiation. Using Fe(CN) 6 3−/4- as a redox probe, LPS recognition can be indicated by the significantly increased electron-transfer resistance ( R et ) as a result of the coaction of the increased steric hindrance from the peptide-LPS complex and the electrostatic repulsion between LPS and Fe(CN) 6 3−/4- . The impedimetric signal was acquired in the frequency range 0.1 Hz ~ 100 kHz with an initial voltage of 174 mV and an amplitude of 10 mV. The resistance changes (Δ R et ) are linearly related to the LPS concentrations in a broad range (0.1 pg mL −1 ~ 100 ng mL −1 ) with a low detection limit (0.08 pg mL −1 ). Importantly, the electrode shows high selectivity to LPS from Escherichia coli O55:B5 compared to other bacterial sources and considerable anti-interference to 0.1% fetal calf serum, demonstrating its potential application in clinically relevant samples. Another highlight is that the AuNP/(TiO 2 + TAPP)/GCE surface can be photocatalytically regenerated under light irradiation (50 mW cm −2 , 300–2500 nm) without any obvious damage to the electrode microstructure. After simple peptide re-immobilization, the regenerated electrode demonstrates LPS response similar to the peptide less one, and the deviation is only 2.89% after 5-cycle reuse.
A peptide (Li5–025)-modified AuNP/(TiO 2 + TAPP porphine)/GCE was proposed, which not only has excellent electrochemical analytical performances for LPS assay in serum but also can be reused after light irradiation and subsequent peptide re-immobilization.
研究领域:
分析化学
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生物化学
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纳米技术
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电化学
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生物传感器
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zihan Qi,Murong Xi,Zhenjie Liu,Rui Sheng,Wei Wang,Tianlong Wu,Yudai Huang
The Zn/electrolyte interface stability is related to HER, passivation, dendrites, corrosion and Zn 2+ deposition orientation. Reducing the occupation of H 2 O dipoles in the inner layer of electrical double layer (EDL) is conducive to the inhibition of interfacial side reactions and directing the deposition of Zn 2+ along the (002) crystalline surface, which are beneficial to the reduction of dendrites and the improvement of plating/stripping reversibility. A mechanism is elucidated by which Acetyl-L-carnitine Hydrochloride (A-L-CN) reconfigures the EDL structure and guides the selective deposition of Zn 2+ in this paper. Theoretical calculations show that A-L-CN can cover the high-energy active sites on the Zn (101) crystal plane and control the specific crystal orientation of the deposits along the (002) crystal plane to produce faceted epitaxial growth. The electrochemical test results show that the Zn anode has excellent plating/stripping reversibility as well as good cumulative capacity (10 mA cm −2 , 1 mA h cm −2 , ACE of 99.80 %, CPC of 7,753 mA h cm −2 ). The assembled Zn 2+ hybrid supercapacitor (ZHS) and Zn//PANI full cell show excellent performance (ZHS up to 60,000 cycles; the capacity retention ratio of Zn//PANI full cell is 76.7 % after 1,000 cycles). The work offers the possibility of achieving stabilized Zn/electrolyte interface performance.
研究领域:
电化学
·
材料科学
·
储能技术
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DOI
高影响因子
LIQUID CRYSTALS
·
2023
·
IF 2.2
Xiaojing Wu,Xiaoling Niu,Shengbo Zhu,Min Tian,Weiguo Liu
Scientists are faced with a formidable problem in improving the smart properties of multi-stimuli responsive fluorescent materials. Here, we integrated two kinds of stimuli-responsive materials: aggregation-induced emission (AIE) and liquid crystals (LCs) into one system. An AIE-active fluorescence liquid crystal compound of α-cyanodistyrene derivate Py-CN-LBM8 was synthesised using knoevenagel condensation reaction. Its AIE effect, LC behaviour, multi-stimuli responsive properties and mechanisms were investigated by polarised optical microscopes (POM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), UV-visible (UV-vis) absorption spectra and photoluminescence (PL) spectra. The results showed that Py-CN-LBM8 exhibited significant physical response to external stimuli including temperature, mechanical force, solvent, pH and trace water. This work provided a strategy for designing new multi-stimuli responsive materials and made it possible to apply in the multifunction anti-counterfeit, sensor and information storage fields.
研究领域:
材料科学
·
化学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）